Power Quality and Management (2180911) MCQs

MCQs of Harmonics

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1.
State whether the statement given is true or false. "Harmonics are aperiodic in nature".
(a) True
(b) False
Answer:

Option (b)

2.
If the fundamental frequency is 60 Hz then 7th harmonic frequency is __________
(a) 420
(b) 210
(c) 8.57
(d) 60
Answer:

Option (a)

3.
_______________ refers to the individual frequency elements that comprise a composite waveform
(a) Harmonic sequence
(b) Individual harmonic distortion
(c) Total harmonic distortion
(d) Harmonic number
Answer:

Option (d)

4.
Harmonic The harmonic number 0 represents _______________ of the waveform
(a) the constant or DC component
(b) fundamental
(c) 50 hz
(d) 60 hz
Answer:

Option (a)

5.
Uneven current draw between the positive and negative halves of one cycle of operation can generate _______ harmonics
(a) odd
(b) even
Answer:

Option (b)

6.
Subharmonics have frequencies______________the fundamental frequency
(a) below
(b) above
(c) same as
(d) exactly half of
Answer:

Option (a)

7.
Subharmonics in the system are present due to presence of ______________
(a) Only R
(b) Only L
(c) R and C
(d) L and C
Answer:

Option (d)

8.
The fundamental frequencies have a _______________ sequence
(a) positive-phase
(b) negative-phase
(c) zero
(d) forward-phase
Answer:

Option (a)

9.
Which of the following is not the harmonic frequency if the fundamental has 20 Hz of frequency
(a) 100 Hz
(b) 150 Hz
(c) 200 Hz
(d) 80 Hz
Answer:

Option (b)

10.
If the system has fundamental frequency of 50 Hz and is balanced with all parameters point of view then which of the following harmonic frequency does not get produce?
(a) 100 Hz
(b) 150 Hz
(c) 250 Hz
(d) 450 Hz
Answer:

Option (a)

Showing 1 to 10 out of 29 Questions
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